drivers/net/ethernet/samsung/sxgbe/sxgbe_platform.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /* 10G controller driver for Samsung SoCs
   3  *
   4  * Copyright (C) 2013 Samsung Electronics Co., Ltd.
   5  *              http://www.samsung.com
   6  *
   7  * Author: Siva Reddy Kallam <siva.kallam@samsung.com>
   8  */
   9
  10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  11
  12 #include <linux/etherdevice.h>
  13 #include <linux/io.h>
  14 #include <linux/module.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/of.h>
  17 #include <linux/of_irq.h>
  18 #include <linux/of_net.h>
  19 #include <linux/phy.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/sxgbe_platform.h>
  22
  23 #include "sxgbe_common.h"
  24 #include "sxgbe_reg.h"
  25
  26 #ifdef CONFIG_OF
  27 static int sxgbe_probe_config_dt(struct platform_device *pdev,
  28                                  struct sxgbe_plat_data *plat,
  29                                  const char **mac)
  30 {
  31         struct device_node *np = pdev->dev.of_node;
  32         struct sxgbe_dma_cfg *dma_cfg;
  33         int err;
  34
  35         if (!np)
  36                 return -ENODEV;
  37
  38         *mac = of_get_mac_address(np);
  39         err = of_get_phy_mode(np, &plat->interface);
  40         if (err && err != -ENODEV)
  41                 return err;
  42
  43         plat->bus_id = of_alias_get_id(np, "ethernet");
  44         if (plat->bus_id < 0)
  45                 plat->bus_id = 0;
  46
  47         plat->mdio_bus_data = devm_kzalloc(&pdev->dev,
  48                                            sizeof(*plat->mdio_bus_data),
  49                                            GFP_KERNEL);
  50         if (!plat->mdio_bus_data)
  51                 return -ENOMEM;
  52
  53         dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg), GFP_KERNEL);
  54         if (!dma_cfg)
  55                 return -ENOMEM;
  56
  57         plat->dma_cfg = dma_cfg;
  58         of_property_read_u32(np, "samsung,pbl", &dma_cfg->pbl);
  59         if (of_property_read_u32(np, "samsung,burst-map", &dma_cfg->burst_map) == 0)
  60                 dma_cfg->fixed_burst = true;
  61
  62         return 0;
  63 }
  64 #else
  65 static int sxgbe_probe_config_dt(struct platform_device *pdev,
  66                                  struct sxgbe_plat_data *plat,
  67                                  const char **mac)
  68 {
  69         return -ENOSYS;
  70 }
  71 #endif /* CONFIG_OF */
  72
  73 /**
  74  * sxgbe_platform_probe
  75  * @pdev: platform device pointer
  76  * Description: platform_device probe function. It allocates
  77  * the necessary resources and invokes the main to init
  78  * the net device, register the mdio bus etc.
  79  */
  80 static int sxgbe_platform_probe(struct platform_device *pdev)
  81 {
  82         int ret;
  83         int i, chan;
  84         struct device *dev = &pdev->dev;
  85         void __iomem *addr;
  86         struct sxgbe_priv_data *priv = NULL;
  87         struct sxgbe_plat_data *plat_dat = NULL;
  88         const char *mac = NULL;
  89         struct net_device *ndev = platform_get_drvdata(pdev);
  90         struct device_node *node = dev->of_node;
  91
  92         /* Get memory resource */
  93         addr = devm_platform_ioremap_resource(pdev, 0);
  94         if (IS_ERR(addr))
  95                 return PTR_ERR(addr);
  96
  97         if (pdev->dev.of_node) {
  98                 plat_dat = devm_kzalloc(&pdev->dev,
  99                                         sizeof(struct sxgbe_plat_data),
 100                                         GFP_KERNEL);
 101                 if (!plat_dat)
 102                         return  -ENOMEM;
 103
 104                 ret = sxgbe_probe_config_dt(pdev, plat_dat, &mac);
 105                 if (ret) {
 106                         pr_err("%s: main dt probe failed\n", __func__);
 107                         return ret;
 108                 }
 109         }
 110
 111         priv = sxgbe_drv_probe(&(pdev->dev), plat_dat, addr);
 112         if (!priv) {
 113                 pr_err("%s: main driver probe failed\n", __func__);
 114                 goto err_out;
 115         }
 116
 117         /* Get the SXGBE common INT information */
 118         priv->irq  = irq_of_parse_and_map(node, 0);
 119         if (priv->irq <= 0) {
 120                 dev_err(dev, "sxgbe common irq parsing failed\n");
 121                 goto err_drv_remove;
 122         }
 123
 124         /* Get MAC address if available (DT) */
 125         if (!IS_ERR_OR_NULL(mac))
 126                 ether_addr_copy(priv->dev->dev_addr, mac);
 127
 128         /* Get the TX/RX IRQ numbers */
 129         for (i = 0, chan = 1; i < SXGBE_TX_QUEUES; i++) {
 130                 priv->txq[i]->irq_no = irq_of_parse_and_map(node, chan++);
 131                 if (priv->txq[i]->irq_no <= 0) {
 132                         dev_err(dev, "sxgbe tx irq parsing failed\n");
 133                         goto err_tx_irq_unmap;
 134                 }
 135         }
 136
 137         for (i = 0; i < SXGBE_RX_QUEUES; i++) {
 138                 priv->rxq[i]->irq_no = irq_of_parse_and_map(node, chan++);
 139                 if (priv->rxq[i]->irq_no <= 0) {
 140                         dev_err(dev, "sxgbe rx irq parsing failed\n");
 141                         goto err_rx_irq_unmap;
 142                 }
 143         }
 144
 145         priv->lpi_irq = irq_of_parse_and_map(node, chan);
 146         if (priv->lpi_irq <= 0) {
 147                 dev_err(dev, "sxgbe lpi irq parsing failed\n");
 148                 goto err_rx_irq_unmap;
 149         }
 150
 151         platform_set_drvdata(pdev, priv->dev);
 152
 153         pr_debug("platform driver registration completed\n");
 154
 155         return 0;
 156
 157 err_rx_irq_unmap:
 158         while (i--)
 159                 irq_dispose_mapping(priv->rxq[i]->irq_no);
 160         i = SXGBE_TX_QUEUES;
 161 err_tx_irq_unmap:
 162         while (i--)
 163                 irq_dispose_mapping(priv->txq[i]->irq_no);
 164         irq_dispose_mapping(priv->irq);
 165 err_drv_remove:
 166         sxgbe_drv_remove(ndev);
 167 err_out:
 168         return -ENODEV;
 169 }
 170
 171 /**
 172  * sxgbe_platform_remove
 173  * @pdev: platform device pointer
 174  * Description: this function calls the main to free the net resources
 175  * and calls the platforms hook and release the resources (e.g. mem).
 176  */
 177 static int sxgbe_platform_remove(struct platform_device *pdev)
 178 {
 179         struct net_device *ndev = platform_get_drvdata(pdev);
 180         int ret = sxgbe_drv_remove(ndev);
 181
 182         return ret;
 183 }
 184
 185 #ifdef CONFIG_PM
 186 static int sxgbe_platform_suspend(struct device *dev)
 187 {
 188         struct net_device *ndev = dev_get_drvdata(dev);
 189
 190         return sxgbe_suspend(ndev);
 191 }
 192
 193 static int sxgbe_platform_resume(struct device *dev)
 194 {
 195         struct net_device *ndev = dev_get_drvdata(dev);
 196
 197         return sxgbe_resume(ndev);
 198 }
 199
 200 static int sxgbe_platform_freeze(struct device *dev)
 201 {
 202         struct net_device *ndev = dev_get_drvdata(dev);
 203
 204         return sxgbe_freeze(ndev);
 205 }
 206
 207 static int sxgbe_platform_restore(struct device *dev)
 208 {
 209         struct net_device *ndev = dev_get_drvdata(dev);
 210
 211         return sxgbe_restore(ndev);
 212 }
 213
 214 static const struct dev_pm_ops sxgbe_platform_pm_ops = {
 215         .suspend        = sxgbe_platform_suspend,
 216         .resume         = sxgbe_platform_resume,
 217         .freeze         = sxgbe_platform_freeze,
 218         .thaw           = sxgbe_platform_restore,
 219         .restore        = sxgbe_platform_restore,
 220 };
 221 #else
 222 static const struct dev_pm_ops sxgbe_platform_pm_ops;
 223 #endif /* CONFIG_PM */
 224
 225 static const struct of_device_id sxgbe_dt_ids[] = {
 226         { .compatible = "samsung,sxgbe-v2.0a"},
 227         { /* sentinel */ }
 228 };
 229 MODULE_DEVICE_TABLE(of, sxgbe_dt_ids);
 230
 231 static struct platform_driver sxgbe_platform_driver = {
 232         .probe  = sxgbe_platform_probe,
 233         .remove = sxgbe_platform_remove,
 234         .driver = {
 235                 .name           = SXGBE_RESOURCE_NAME,
 236                 .pm             = &sxgbe_platform_pm_ops,
 237                 .of_match_table = of_match_ptr(sxgbe_dt_ids),
 238         },
 239 };
 240
 241 int sxgbe_register_platform(void)
 242 {
 243         int err;
 244
 245         err = platform_driver_register(&sxgbe_platform_driver);
 246         if (err)
 247                 pr_err("failed to register the platform driver\n");
 248
 249         return err;
 250 }
 251
 252 void sxgbe_unregister_platform(void)
 253 {
 254         platform_driver_unregister(&sxgbe_platform_driver);
 255 }